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http://dx.doi.org/10.7740/kjcs.2016.61.3.215

Effects of Delayed Harvesting of Miscanthus spp. Risen in the Previous Year on its Current Year'S Yield and Growth Characteristics  

Moon, Youn-Ho (Bioenergy Crop Research Institute, National Institute of Crop Science, RDA)
Lee, Ji-Eun (Bioenergy Crop Research Institute, National Institute of Crop Science, RDA)
Yu, Gyeong-Dan (Bioenergy Crop Research Institute, National Institute of Crop Science, RDA)
Cha, Young-Lok (Bioenergy Crop Research Institute, National Institute of Crop Science, RDA)
An, Gi Hong (Bioenergy Crop Research Institute, National Institute of Crop Science, RDA)
Ahn, Joung Woong (Bioenergy Crop Research Institute, National Institute of Crop Science, RDA)
Song, Yeon-Sang (Bioenergy Crop Research Institute, National Institute of Crop Science, RDA)
Lee, Kyeong-Bo (Bioenergy Crop Research Institute, National Institute of Crop Science, RDA)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.61, no.3, 2016 , pp. 215-221 More about this Journal
Abstract
This study examined the effects of delayed harvest of Miscanthus on its biomass yield and growth characteristics. The trial was conducted at a 5-year-old demonstration field, using Miscanthus sacchariflorus cv. Geodae 1 and Miscanthus ${\times}$ giganteus. Harvesting was carried out using a mower, baler, and bale picker driven by a 5-ton tractor. Harvesting dates were the $1^{st}$, $10^{th}$, and $17^{th}$ of April, which respectively corresponded with the first, mid, and last emerging dates of new shoots. The sequential changes in stem number due to delayed harvesting were investigated on April $29^{th}$, May $27^{th}$, July $22^{nd}$, and October $30^{th}$, which corresponded to the juvenile, mid, luxuriant, and senescence stem stages, respectively. Soil penetration resistance, biomass yield, and growth characteristics were investigated on October $30^{th}$. There was no difference in soil penetration resistance at a depth of 10 cm, but it increased at a depth of 20 cm in proportion to the delayed harvesting time. The sequential change in stem number due to delayed harvesting was greater in M. sacchariflorus cv. Geodae 1 than in M. ${\times}$ giganteus. In M. sacchariflorus cv. Geodae 1, which was harvested on the last emerging date of new shoots, the stem number was $169/m^2$ in the mid stage but decreased to $70/m^2$ in the luxuriant stage. The diameter of newly developed rhizomes, stem height, and biomass yield decreased in the two Miscanthus species due to delayed harvesting. The ratio of Miscanthus headings, which is a critical characteristic for landscape use, also decreased due to delayed harvesting. Heading of M. sacchariflorus cv. Geodae 1 was not observed in plots harvested on the mid and last emerging dates of new shoots.
Keywords
delayed harvesting; growth characteristics; Miscanthus; yield;
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Times Cited By KSCI : 2  (Citation Analysis)
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